Depending on your point of view, there is the "Traditional" style of Judo which, whilst as aggresive as any other form it does not exist purely as a sport. Then there is Olympic Judo, which is very competitive and oriented to winning medals. In Britain there are various organisations like the British Judo Council (MAC) and ZenJudo which I think are more traditional than the British Judo Association. This is , however only my opinion as a BJA member who would like to see more traditional training brought back to the fore.

In Japan a few Universities also Train "Kosei Judo" which is very Groundwork biased. (This coincidentially was taught to the Gracies of Brazil who founded Brazillian Ju Jutsu.)

Judo as practiced in Japan(kodokan judo)is a lot of good technique and power in the right direction.what you see in the europe style is a lot of power in any direction .when you watch a japanese contest.finese with the power of a bull Elephant.even the great anton gessenk(spelled wrong)trained in japan.and learned from the japanese methods.Long winded so i am done.

Karate has distinctly different styles, schools or "ryu," and when Jigoro Kano founded the Kodokan in 1882, it was one "ryu" of jujutsu. In fact at that time there was probably not a distinction between karate and jujutsu as they were both unarmed (empty hand) arts and there were many names in use including Yawara and Taijutsu.

Kano changed the name of jujutsu to judo when he brought together many ryu of jujutsu under the one unifying principle of "maximum effeciency." The ju in judo and jujutsu represent the same concept of yielding to gain victory. But where as "jutsu" means "art" and referes to a collection of techniques, "do" means "way" which can be interpreted as guiding principle or "way" of life.

In Japan, Judo effectively replaced the older jutjutsu ryu. But abroad, some "jujutsu" schools exist to teach some of the techniques that have been eliminated from Judo.

Currently different Judo clubs may emphasize different aspects of Judo - ie sport vs self defense - or individual players may be said to have different "styles" in terms speed vs strength or being more proficient at groundwork vs standing techniques, but it is all Kodokan Judo.